(4) Depot and Customer Nodes Information. Four delivery
scenarios with different number of customer nodes were set
for the test. The spatial distribution of depot and customer
nodes is shown in Figure 5. The symbol ⋆ denoted depot, and
∙ denoted customer node.
(5) Customer Information
(i) Demand range: 1–40 units (random integers drawn
from the Solomon’s test instance R101 [19]).
(ii) Service time of customers: the service time of each
customer is fixed as 30 minutes.
(iii) The earliest service time of each customer: the earliest
start service time of each customer is generated based
on the test instance R101 of Solomon instances [19],
ranging from 8 AM to 5 PM.
(6) Time Window Information
(i) The working hours of the depot is [8:00, 19:00].
(ii) 30 minutes time window of customers: specify 30
minutes time window from the earliest start service
time for each of the customers.
(7) Vehicle Information
(i) Fleet size is 30.
(ii) Vehicle capacity is 200 units.